Serge Castonguay

Systèmes Sous-sol Québec

Title: System Design Specialist

Hometown: Montreal

Serge Castonguay from Systèmes Sous-sol Québec

Serge is a real estate enthusiast, having himself completed many home improvement projects. His ability to work meticulously and his communication skills are qualities our customers really appreciate. Serge takes his time when thoroughly evaluating a home and then focuses on the most efficient way to answer the customer’s needs.

Systèmes Sous-sol Québec saw what an asset Serge would be to the company with his background in home improvement and immediately brought him on board. By sharing his experience with homeowners and explaining the effects of water or foundation damage, he can really relate to them and prevent problems before they occur or worsen. He is a trusted and valued member of the Systèmes Sous-sol Québec team and upholds the standards of the company. Serge has been thoroughly trained and has earned the title of “Waterproofing and Foundation Repair Professional” through the Basement Systems and Supportworks international networks.

Systèmes Sous-sol Québec is the regional dealer of the Basement Systems International Waterproofing Network, a group of over 350 of the best waterproofing contractors in the world, who have exclusive access to patented products, comprehensive training and support through the international company. Systèmes Sous-sol Québec is also the dealer of Supportworks Inc., a foundation repair contractor network across the United States and Canada, helping residential and commercial property owners fix their failing foundations.

Serge enjoys meeting with homeowners and demonstrates great patience when it comes to explaining the various products available.

During his free time, he enjoys sports, cooking and travelling.

Before and after photos from jobs I've worked on:
  • FexiSpan injection in  a basement in Pointe-Claire, Qc
    FexiSpan injection in  a basement in Pointe-Claire, Qc

    FexiSpan injection in a basement in Pointe-Claire, Qc

    In Mr. Birks' basement, there were 2 cracks on the walls of his foundation. When it rained or simply when he turned on his garden hose, water would pass through these cracks and create water infiltration inside. Our client wanted to finish his basement and in order to do that he had to repair these cracks. He therefore contacted Systèmes Sous-sol Québec for a quick solution to eliminate this water infiltration.

     Our experts started by injecting polyurethane into the cracks. This resin goes deep into the cracked wall, unlike methods that simply repair the surface, and goes down to the ground outside. Following the injection, they installed our FlexiSpan wall crack repair system to stop water from coming in.


    Polyurethane injection combined with FlexiSpan is a permanent solution to keep wall cracks dry.

  • Stabilizing a crawl space in Montreal, Qc
    Stabilizing a crawl space in Montreal, Qc

    Stabilizing a crawl space in Montreal, Qc

    The foundation of Mr. Diaz's house was slowly sagging. He knew that if he does nothing, his foundation will continue to sag. So he wanted to have it fixed before the problem gets worse. He decided to contact Système Sous-sol Québec to obtain a permanent solution.

    The problem was that the ground under the foundation is weak and unstable. This caused movement of the wooden beams which support the weight of the house causing overload of weight and slits in the beams in several places. Because of this, the foundation was quietly sagging.

    The solution for our client is to install SmartJack supports to support the joist reinforcement device in place. A hole is dug in the earth for each SmartJack installed and is filled with compacted fill to create a stable base. About ten brackets were installed in order to support the weight evenly and straighten the floor to the floor above in its initial position.

     With this solution, Mr. Diaz will have nothing more to fear for his foundation.

our service area

We serve the following areas

OntarioQuebec Our Locations:

Systèmes Sous-sol Québec
1620 boul Saint-Elzéar O
Laval, QC H7L 3N2
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